Research design can be considered as the shape of the study. It is the arrangement of situation for the collection and analysis of data in a way that aims to combine relevance to the research purpose with economy in procedures. In fact, the research design is the conceptual structure within which research is conducted; it constitutes the design for the collection, amount, and analysis of data (Kothari, 2004). To achieve the research objectives the researcher employed a mixed research approach. Because, according to Bryman & Bell (2003), the combination of both qualitative and quantitative methods is rising as the most valid and reliable way to develop the understanding of complex social reality.
Therefore, the researcher employed both qualitative and quantitative data collection methods to gather the necessary data and information deeply and broadly from the sample population.The researcher engaged a descriptive type of research methods; because this type of research helps to describe and analyze the existing practices and challenges of solid waste management in the study area. The method is the most appropriate way to answer questions concerning the subjects under discussion. Moreover, it helps to carry out an accurate study of institution, a community or phenomena being studied (O’sullivan, 2003). Thus, the researcher used to descriptive method to describe, analyses and interpret the current practices and challenges of solid waste management in Mekane Selam town administration.
3.4. Sample Design